Discs

Tines

Tetra, the seedbed preparer for any seed size

The seedbed or vibrocultivator is a simple tool to use and maintain. It is a lightweight machine with low power consumption. Its role is to break the clods as a result of plowing to create a seedbed. The vibrocultor provides a sort of clods on the worked surface. This gives the advantage of sowing in a fine soil and thus favorable to germination.

Tetra 80

What are Tetra’s agronomical advantages?

Surface levelling, sowing depth

It is cheaper and more profitable on any cultivated plot if plants are grown at the same time. For perfect plant emergence, perfect levelling is required. The Tetra allows you to level, smooth and re-consolidate the soil in a single pass.

Germination requires a seed depth which is deep enough to prevent the seed drying out but shallow enough to ensure a high rate of emergence and good plant density.

Soil-seed contact

To germinate, the seed must absorb a large amount of water. Once it has swollen, it will be able to live on its reserves while it waits for leaves and moves on to photosynthesis.

Access to water will be through soil contact. If soil clods are too coarse, the seed can’t get to it easily. Crumbling reduces the presence of obstacles to lifting and porosity provides access to water and oxygen.

Superficial crumbling

In order to have small clods on the surface and the fine soil underneath, you can adjust the degree of refinement in different positions on the machine.

In non crusting soil, the maximum degree of refinement and the best soil-seed contact possible is needed while avoiding rapid drying. The choice of ploughing depth also depends on pedo-climatic risks (crusting, dry conditions, etc.) during the germination and emergence phases.

Soil warming

To grow, each seed has to reach a minimum temperature in order to germinate. By mixing the top soil layers, the Tetra allows the soil to warm up more easily in the sun so the plant can reach the right temperature in order to grow.

The Tetra also gives the seed access to air. It can then absorb oxygen but also release carbon dioxide. By breathing, it can germinate.

Tines for every type of seedling

Type of soil

Clay

Light clay

Seed size

Small

Average

Vibrocultivator tines

Straight profile, Double spring

Spacing between tines: 4

Rows of tines: 94 mm

Width: 32 mm

Thickness: 12 mm

Length: 400 mm

Vibrocultivator tines

S-Shaped, Double spring

Spacing between tines: 4

Rows of tines: 94 mm

Width: 32 mm

Thickness: 12 mm

Length: 400 mm

Vibrocultivator tines

Straight

Spacing between tines: 5

Rows of tines: 60 mm

Width: 32 mm

Thickness: 10 mm

Length: 285 mm

Vibrocultivator tines

S-Shaped

Spacing between tines: 5

Rows of tines: 60 mm

Width: 32 mm

Thickness: 10 mm

Length: 285 mm

Clever design

Single beam chassis

Made of high quality steel with a diameter of 150 x 150 mm, the main beam of the Tetra resists torsion effects to give a long working life. Being closer to the tractor, the machine’s centre of gravity is more centralized. This makes lifting easier and improves balance on the road.

Highly resistant swinging pivots

The vibrocultivators are equipped with pivot bars which allow the elements to swing. They are made of solid HTS steel (high yield strength) to provide flexibility to the lift and resistance to wear.

Components parallel to the ground

Once you have set the Tetra’s level, you can adjust the various working components. They are all 1.5 m wide and are independent. With the parallelogram and the swinging pivot, you can follow the field perfectly.

Adjustable levelling blade

Rear-facing, the position prevents accumulation of earth. It is equipped with small depth-adjustable tines that trim and level the ground. Spring-mounted and mechanically or hydraulically height adjustable, it adapts easily to conditions.

Hydraulic locking

For greater safety during storage and transport, the frame is fully locked by a balancing valve on the jack. This prevents the machine from opening accidentally. No additional handling is necessary to (un)lock the machine.

Maintenance-free roller

The twin roller side cover prevents small ridges forming between the roller elements to give uniform levels. Positioned inside the roller, the bearings are protected from splashes.

Very low operating costs

Light clay

Wide

With such a light weight, it can maintain a good working width while coupled to a small tractor.

Economical

Its weight-width ratio allows you to save fuel by making more effective and fewer passes.

Non-powered machine

Unlike rotary harrows, seedbed preparers have no Power Take Off (PTO). As a result, they use less energy.

Low wear

Vibrocultivator tines are made of high strength steel and are equipped with coulters. You only have to change the coulters when they are worn. The levelling blade tines are replaced less frequently,.

Work rate

You are operational immediately with rapid folding and unfolding. Simple adjustments allow you to adapt the tools to different conditions in minutes. Thanks to generous working widths, you can prepare your seed beds in record time.

1 versatile roller for successful seedling preparation

Twin roller

Excellent dispersal of clods, even in pebbly soils, the twin roller roller perfectly finishes tine work and levels the surface. It has a double roller with staggered seating to avoid creating small ridges between the different roller elements.

Leave no trace...

A track eradicator allows you to loosen surfaces compacted by tractor wheels. Water can then infiltrate and so avoid lower return from wheel tracks.

Grégoire Besson provides different track eradicators depending on the type ofwheels and the type of soil.

Narrow cast iron

Eradication width: 4cm

Sold by: 4

Ideal for depth and for making narrow passages in compacted soil.

Duck’s foot

Eradication width: 28 cm

Sold by: 2

Perfect for shallow and wide work to erase tractor tyre tread marks.

Space-saving and secure transport and storage

The different elements of the Tetra are superimposed on each other when folded. This positioning avoids exposing tines to road users. This safety feature and its compactness are also advantages for storage.

DREAL road traffic approval.

Dimensions during transport or worst-case storage:

50

Width :
3,00 m. (9,84 ft.)
Height :
1,75 m. (5,74 ft.)

60

Width :
3,00 m. (9,84 ft.)
Height :
2,59 m. (8,50 ft.)

70

Width :
3,00 m. (9,84 ft.)
Height :
3,35 m. (10,99 ft.)

80

Width :
3,00 m. (9,84 ft.)
Height :
4,19 m. (13,75 ft.)

A look around your machines...

Recap

1.Ease of use

2.Real agronomic benefits

3.Quick settings

4.Very low maintenance

5.Intelligent design

6.Choice of tines and rollers

7.Low overall ownership costs

8.Effective track mark eradicators

9.Secure transport and storage

10.Adaptable to all types of seeds

Configure your Tetra www.gregoire-besson.com

Configure your seed bed preparer quicklyand get an idea of cost.

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* Prices excluding taxes, delivery charges, entry into service and customs duties. Estimated price, non negotiated public price, ex works. Amounts, options, currencies and exchange rates may vary from country to country and at any time.** Homologation-cancelling option in France